Trimetallic Mesoporous AuCuNi Electrocatalysts with Controlled Compositions Using Block Copolymer Micelles as Templates
Trimetallic Mesoporous AuCuNi Electrocatalysts with Controlled Compositions Using Block Copolymer Micelles as Templates
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DOI：
10.1002/smtd.201800283
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发表时间：
2018-12-11
期刊：
影响因子：
12.4
通讯作者：
Asahi, Toru
中科院分区：
文献类型：
--
作者：
Nugraha, Asep Sugih;Malgras, Victor;Asahi, Toru
纳米结构工程在开发金属基催化剂以提高材料利用效率和催化活性方面具有重要意义。在现有的纳米尺度结构中，介孔结构因其大的比表面积和对客体物种高度可及的内部位置而备受关注，适合于广泛的应用。金(Au)基材料具有稳定性好、无毒、抗中毒等优点，是一种很有前途的催化剂。通过引入廉价金属来修饰组成制备多组份Au基催化剂是降低成本和提高催化活性的有效途径。本文报道了一种利用聚合物胶束组装电化学法合成介孔AuCuNi三元合金薄膜的方法。这种简单的方法包括在聚合物胶束作为牺牲模板存在的情况下，在固定的施加电位下共沉积Au、Cu和Ni前驱体。组成比可以很容易地调节来优化介孔AuCuNi薄膜的催化性能，在葡萄糖氧化和甲醇氧化反应中显示出良好的结果。人们认为，介孔AuCuNi薄膜可以满足下一代多功能催化剂的需要。
Nanostructure engineering is important in the development of metal-based catalysts to improve material utilization efficiency and catalytic activity. Among the available nanoscale architectures, mesoporous structures have raised much attention due to their large surface area and their highly accessible inner sites for guest species, suitable for a wide range of applications. Gold (Au)-based materials are promising catalysts thanks to their stability, nontoxicity, and good resistance to poisoning effects. Modifying the composition by introducing inexpensive metals to prepare multicomponent Au-based catalysts is an effective route to both reduce the cost and improve the catalytic activity. Herein, a polymeric micelle assembly approach to synthesize mesoporous AuCuNi ternary alloy films by electrochemical deposition is reported. This simple method involves the co-electrodeposition process of Au, Cu, and Ni precursors at fixed applied potential in the presence of polymeric micelles acting as a sacrificial template. The compositional ratio can be easily adjusted to optimize the catalytic performance of the mesoporous AuCuNi films, which show promising results for glucose oxidation and methanol oxidation reactions. It is believed that mesoporous AuCuNi films can be desirable to satisfy the needs for the next generation of multifunctional catalyst.